As a function of increasing temperature, the helimagnetic-to-paramagnetic transition at zero magnetic field displays characteristics consistent with a Brazovskii-transition [1]}. In the paramagnetic regime, the Dzyaloshinsky-Moriya interactions generate a strong helical character, while the magnetic anisotropies are vanishingly small, resulting in an enhancement of the phase-space available for fluctuations such that the transition is driven first order. These strong helimagnetic fluctuations above \(T_c\) , which are referred to as the fluctuation-disordered regime [2]}, cause the resulting scattering intensity to spread out over a sphere in reciprocal space without the formation of distinct Bragg peaks.
